JP2024050382A - Pump type discharger - Google Patents

Abstract

To propose a pump type discharger which allows a content liquid to be discharged in the same way as in prior art, and which furthermore is superior in recyclability.SOLUTION: A pump type discharger 100 comprises: a cap 10 attached to the mouth of a container accommodating a content liquid; a pump which is held by the mouth using the cap 10, and drives when a stem 7a moves forward and backward; and a head 11 which has a discharge port 11d for discharging the content liquid to the outside and is coupled to the stem 7a. One of the head 11 and the cap 10 is provided with an extension part 11e which is extended toward the other one of the head 11 and the cap 10. The other one of the head 11 and the cap 10 is provided with a first elastic piece 10e bent in a direction of approaching a center axis O by the extension part 11e when the head 11 advances toward the cap 10, and a second elastic piece 10j bent in a direction of separating from the center axis O.SELECTED DRAWING: Figure 1

Description

The present invention relates to a pump-type dispenser.

A known pump-type dispenser includes a cap that is attached to the mouth of a container, a pump that is held at the mouth by the cap and is driven by the back and forth movement of a stem, and a head that is connected to the stem; the liquid contents in the container are dispensed from the head's outlet by moving the head toward the cap (see, for example, Patent Document 1).

As shown in Patent Document 1, inside such a pump-type dispenser, a coil spring is provided to return the head, which has been moved toward the cap, to its initial position.

JP 2011-31950 A

However, while most of the components of this type of pump dispenser are made of synthetic resin, the coil spring is made of metal. For this reason, when it is discarded after use, it cannot be recycled as a resin product in this state. Furthermore, in general, in this type of pump dispenser, the components are firmly fixed to each other, for example by fitting, to prevent them from coming loose during normal use. Therefore, it takes time to disassemble the pump dispenser and separate the coil spring from the other components.

The present invention aims to solve these problems by proposing a pump-type dispenser that can dispense the liquid contents in the same way as conventional dispensers, and that also has excellent recyclability.

The present invention relates to a pump-type dispenser comprising a cap attached to the mouth of a container that contains a liquid content, a pump that is held at the mouth by the cap and is driven by the back and forth movement of a stem, and a head that has a discharge port for discharging the liquid content to the outside and is connected to the stem, the head being moved toward the cap to discharge the liquid content from the discharge port,
An extension portion is provided on either the head or the cap, the extension portion extending toward the other of the head or the cap,
This is a pump-type dispenser in which the other of the head and the cap is provided with a first elastic piece that bends toward the central axis of the stem by the extension portion when the head is advanced toward the cap, and a second elastic piece that bends away from the central axis.

It is preferable that the first elastic piece and the second elastic piece are arranged adjacent to each other on the cap.

The extension portion has a cylindrical shape centered on the central axis line,
It is preferable that the distance from the radial center position of the extension portion to the radial center position of the first elastic piece is equal to the distance from the radial center position of the extension portion to the radial center position of the second elastic piece.

the first elastic piece has a first tip portion that is located closer to the central axis than a tip portion of the extension portion when the head is retracted from the cap,
It is preferable that the second elastic piece has a second tip portion that is located farther from the central axis than the tip portion of the extension portion when the head is retracted from the cap.

It is preferable that the tip of the extension has a semicircular cross-sectional shape.

It is preferable that the cap has a cap-side peripheral wall that extends in a direction circumferentially around the central axis and surrounds the first elastic piece and the second elastic piece.

The head is rotatable about the central axis relative to the cap between a standby position and an operating position,
The extension portion has an inward convex portion that protrudes toward the central axis and an outward convex portion that protrudes away from the central axis,
when the head is rotated to the standby position, the inward convex portion is not in contact with the first elastic piece and the outward convex portion is not in contact with the second elastic piece,
It is preferable that, when the head is rotated to the operating position, the inward convex portion bends the first elastic piece toward the central axis and the outward convex portion bends the second elastic piece away from the central axis.

It is preferable that the cap has a stopper that is non-contact when the head is rotated to the operating position and moved toward the cap, and that contacts the head to prevent movement toward the cap when the head is rotated to the standby position and moved toward the cap.

the cap has a cap-side peripheral wall extending in a direction circumferentially around the central axis, and the head has a head-side peripheral wall extending in a direction circumferentially around the central axis,
One of the cap side peripheral wall and the head side peripheral wall has a projection protruding toward the other one,
It is preferable that the other of the cap side peripheral wall and the head side peripheral wall has a longitudinal groove extending along the central axis and into which the protrusion is received when the head is rotated to the operating position.

It is preferable that the other of the cap side peripheral wall and the head side peripheral wall extends in a direction circumferential to the central axis, is located between the standby position and the operating position, and has a contact surface that makes radial contact with the protrusion.

the head is rotatable about the central axis relative to the cap from the standby position through the operating position to a second operating position,
the extension portion has the inward convex portion, a second inward convex portion that protrudes in a direction toward the central axis and has a larger protrusion amount than the inward convex portion, the outward convex portion, and a second outward convex portion that protrudes in a direction away from the central axis and has a larger protrusion amount than the outward convex portion,
when the head is rotated to the standby position, the inward convex portion and the second inward convex portion are not in contact with the first elastic piece, and the outward convex portion and the second outward convex portion are not in contact with the second elastic piece,
When the head is rotated to the operating position, the inward convex portion bends the first elastic piece toward the central axis, and the outward convex portion bends the second elastic piece away from the central axis,
It is preferable that, when the head is rotated to the second operating position, the second inward convex portion bends the first elastic piece toward the central axis to a greater extent than the inward convex portion bends the first elastic piece, and the second outward convex portion bends the second elastic piece away from the central axis to a greater extent than the outward convex portion bends the second elastic piece.

the cap has a cap-side peripheral wall extending in a direction circumferentially around the central axis, and the head has a head-side peripheral wall extending in a direction circumferentially around the central axis,
One of the cap side peripheral wall and the head side peripheral wall has a projection protruding toward the other one,
the other of the cap side peripheral wall and the head side peripheral wall has a vertical groove extending along the central axis and into which the protrusion is received when the head is rotated to the operating position;
It is preferable that the other of the cap side peripheral wall and the head side peripheral wall has a second longitudinal groove extending along the central axis and into which the protrusion is received when the head is rotated to the second operating position.

the other of the cap side peripheral wall and the head side peripheral wall has a contact surface extending in a direction circumferentially around the central axis, positioned between the standby position and the operation position, and in radial contact with the protrusion;
It is preferable that the other of the cap side peripheral wall and the head side peripheral wall has a second contact surface extending in a direction circumferentially around the central axis, located between the operating position and the second operating position, and located closer to the central axis than the contact surface and in radial contact with the protrusion.

According to the pump-type dispenser of the present invention, when the head is moved toward the cap, the extension causes the first elastic piece to bend toward the central axis of the stem, and the second elastic piece to bend away from the central axis of the stem, so that the head can be returned to its initial position when the bent first elastic piece and second elastic piece are restored. In other words, the pump-type dispenser of the present invention can be used in the same way as conventional ones without using a metal coil spring, and can be recycled as a resin product without disassembling it when discarded. In addition, because the first elastic piece bends in the opposite direction to the second elastic piece, a force that twists the extension acts between the first elastic piece and the second elastic piece. Therefore, the head can be returned more reliably.

4 is a vertical cross-sectional view (a vertical cross-sectional view taken along the arrow B in FIG. 3 ) as viewed from the side, showing a state before a first elastic piece is deflected in the first embodiment of the pump-type dispenser according to the present invention. FIG. 3 is a longitudinal cross-sectional view (a longitudinal cross-sectional view taken along the arrow C in FIG. 3 ) as seen from behind, showing a state before a second elastic piece in the embodiment shown in FIG. 1 is bent. 3 is a cross-sectional view taken along line AA in FIGS. 1 and 2, showing the relationship between the first elastic piece and the second elastic piece and the extension portion before bending. FIG. 2 is a vertical cross-sectional view seen from the side, showing a state in which the head is pressed from the state shown in FIG. 1 and a first elastic piece is bent. 3 is a vertical cross-sectional view seen from behind, showing a state in which the head is pressed from the state shown in FIG. 2 and the second elastic piece is bent. 6 is a cross-sectional view taken along line DD in FIG. 4 and FIG. 5, showing the relationship between the first elastic piece and the second elastic piece and the extension portion after bending. FIG. 2 is a longitudinal cross-sectional view, similar to FIG. 1, showing a state before a first elastic piece in a pump-type dispenser according to a modified example of the first embodiment is deflected. 3 is a longitudinal cross-sectional view, similar to FIG. 2 , showing a state before a second elastic piece in a pump type dispenser according to a modified example of the first embodiment is deflected. FIG. 8 is a vertical cross-sectional view showing a state in which the head is pressed from the state shown in FIG. 7 and the first elastic piece is bent. 9 is a vertical cross-sectional view showing a state in which the head is pressed from the state shown in FIG. 8 and the second elastic piece is bent. 14 is a longitudinal sectional view (a sectional view taken along line FF in FIG. 13) of a pump type dispenser according to a second embodiment of the present invention in a standby position. FIG. 13 is a vertical cross-sectional view (cross-sectional view taken along line GG in FIG. 13) in the standby position in the embodiment shown in FIG. 11. 12 is a cross-sectional view taken along line E-E in FIG. 11 , showing the relationship between the first elastic piece, the second elastic piece, and the extension portion in the standby position. 14 is a cross-sectional view taken along line HH in FIG. 13. 17 is a vertical cross-sectional view (cross-sectional view taken along line K-K in FIG. 17) in the operation position in the embodiment shown in FIG. 11. 17 is a vertical cross-sectional view (cross-sectional view taken along line LL in FIG. 17) in the operation position in the embodiment shown in FIG. 11. 16 is a cross-sectional view taken along line JJ in FIG. 15, showing the relationship between the first elastic piece, the second elastic piece, the inward convex portion, and the outward convex portion in the operating position. 16 is a vertical cross-sectional view showing a state in which the head is pressed from the state shown in FIG. 15 so that the second elastic piece is bent. 17 is a vertical cross-sectional view showing a state in which the head is pressed from the state shown in FIG. 16 and the first elastic piece is bent. FIG. 18 is a cross-sectional view of a pump-type dispenser, the head of which can be rotated to a standby position, an operating position, and a second operating position, according to a modification of the second embodiment, in the operating position, shown in accordance with FIG. 17. 21 is a cross-sectional view showing a state in which the head is rotated from the state shown in FIG. 20 to a second operating position.

The following describes the pump type dispenser 100, which is a first embodiment of the pump type dispenser according to the present invention, and the pump type dispenser 200, which is a second embodiment, with reference to the drawings. In this specification and the like, the up-down direction refers to the direction along the illustrated central axis O (the central axis of the stems 7a and 27a described later), with the side where the pipes 4 and 24 are located being the "lower" side and the side where the heads 11 and 31 are located being the "upper" side. The radial direction refers to the direction perpendicular to the central axis O in a plane perpendicular to the central axis O, and the circumferential direction refers to the direction around the central axis O in this plane. The front side refers to the side where the nozzle 11c described later is directed (the left side in FIG. 1), and the back side refers to the opposite side (the right side in FIG. 1). The left side and right side refer to the left and right directions when viewed from the front side toward the back side.

The pump-type dispenser 100 of the first embodiment is used by attaching it to the mouth of a bottle-shaped container (not shown). The liquid content dispensed by the pump-type dispenser 100 is, for example, shampoo, body soap, hand soap, facial cleanser, etc.

The pump-type dispenser 100 is composed of a cylinder 1, a valve member 2, a pipe 4, an internal member 5, a piston 6, a cylindrical member 7, a holder 8, a packing 9, a cap 10, and a head 11. Here, the cylinder 1, the valve member 2, the internal member 5, the piston 6, the cylindrical member 7, and the holder 8 are members that constitute the "pump" in this specification. Among the above members, the valve member 2, the piston 6, and the packing 9 are made of elastic soft synthetic resin (e.g., polyethylene (LDPE, HDPE, foamed PE)), and the other members are made of hard synthetic resin (e.g., polypropylene (PP), polybutylene terephthalate (PBT), polyacetal (POM) resin, etc.). Each member that constitutes the pump-type dispenser 100 is basically formed in a shape centered on the central axis O.

The cylinder 1 has a disk-shaped bottom wall 1a with a central protruding upward, a cylindrical tube wall 1b that stands up from the outer edge of the bottom wall 1a, and a flange wall 1c that extends radially outward from the upper part of the tube wall 1b. A through hole (suction port 1d) is provided in the protruding central part of the bottom wall 1a. A cylindrical retaining tube 1e that surrounds the suction port 1d and extends downward to hold the pipe 4 is provided on the underside of the bottom wall 1a. A through hole (vent hole 1f) is provided in the tube wall 1b.

The valve member 2 includes a base 2a, a valve body 2b that covers the suction port 1d and seats on the upper surface of the bottom wall 1a, and an elastically deformable connecting piece 2c that connects the base 2a and the valve body 2b. The valve member 2 functions as a check valve, and when the pressure inside the cylinder 1 is reduced, the valve body 2b that has been closing the suction port 1d moves away from the bottom wall 1a to open the suction port 1d.

In this embodiment, the base 2a is cylindrical with a lid and has an opening (not shown) through which the liquid content passes after passing through the suction port 1d. The base 2a is fitted and held against the inner circumferential surface of the cylindrical wall portion 1b, so that the valve member 2 is held within the cylinder 1.

The pipe 4 is hollow, and its upper end is inserted into the retaining tube 1e and is held in place by fitting therein.

The internal member 5 is disposed inside the cylinder 1 and moves up and down relative to the cylinder 1. The internal member 5 comprises a cylindrical connecting tube 5a and a bottom portion 5b that closes the lower end of the connecting tube 5a and extends radially outward. The connecting tube 5a is provided with a hole (communication port 5c) that passes through it, and the top surface of the bottom portion 5b is provided with an annular portion 5d that is located radially outward from the connection portion with the connecting tube 5a.

The piston 6 is inserted through the connecting tube 5a and positioned above the bottom 5b. The piston 6 in this embodiment has a circular base 6a. An outer sliding piece 6b extending upward and downward from the base 6a is provided on the outer edge of the base 6a. The outer sliding piece 6b slidably and liquid-tightly contacts the inner peripheral surface of the tube wall portion 1b. An inner sliding piece 6c extending upward and downward from the base 6a is provided on the inner edge of the base 6a. The lower part of the inner sliding piece 6c slidably and liquid-tightly contacts the inner peripheral surface of the annular portion 5d, and the upper part slidably and liquid-tightly contacts the inner peripheral surface of the enlarged diameter portion 7b of the tubular member 7, which will be described later.

The tubular member 7 is a member that is generally tubular. The tubular member 7 has a cylindrical stem 7a and an expanded diameter portion 7b that is connected to the lower end of the stem 7a and has a larger diameter than the stem 7a. When the connecting tube 5a is inserted into the stem 7a, the two are fitted together, so that the internal member 5 and the tubular member 7 move together relative to the cylinder 1.

The holder 8 has a portion located radially outward of the stem 7a and a portion located radially outward of the enlarged diameter portion 7b, and is equipped with a holder base 8a that is fitted and held against the inner peripheral surface of the cylindrical wall portion 1b. A flange 8b extending radially outward is provided at the upper end of the holder base 8a. The holder 8 prevents the internal member 5, piston 6, and cylindrical member 7 from slipping out of the cylinder 1.

The packing 9 is in the shape of a circular ring plate, and is inserted into and held in the cylindrical wall portion 1b of the cylinder 1. When the pump-type dispenser 100 is attached to a container (not shown), the packing 9 is sandwiched between the mouth of the container and the flange wall 1c. This prevents problems such as the contents spilling out of the mouth when the container is turned over.

The cap 10 has a disk-shaped top wall 10a with a through hole in the center. The outer edge of the top wall 10a is provided with a lower peripheral wall 10b extending downward and an upper peripheral wall 10c extending upward. The upper peripheral wall 10c corresponds to the "cap side peripheral wall" in this specification. The lower peripheral wall 10b can fit and hold the flange wall 1c at the edge of the through hole described above, thereby holding the cylinder 1 in the cap 10. The inner surface of the lower peripheral wall 10b is provided with a female threaded portion 10d that screws into a male threaded portion provided at the mouth of the container, and the cap 10 can be attached to the container by screwing the male threaded portion and the female threaded portion 10d together.

The cap 10 also includes a plate-like first elastic piece 10e that extends upward from the upper surface of the top wall 10a on the radial outer side of the through hole in the top wall 10a and is elastically deformable radially inward. As shown in Figs. 1 and 3, the first elastic piece 10e of this embodiment includes a plate-like root portion (first root portion 10f) that is connected to the top wall 10a and has an arc shape in a plan view, an inclined portion (first inclined portion 10g) that inclines radially inward as it moves upward from the upper end of the first root portion 10f, and a tip portion (first tip portion 10h) that extends upward from the upper end of the first inclined portion 10g. The first elastic piece 10e of this embodiment is provided on the front side and the back side, one each (two in total) so as to face the central axis O. Here, the distance from the central axis O to the radial center position of the first elastic piece 10e (the center position in the thickness direction of the first root portion 10f) is defined as the distance L1.

Furthermore, as shown in Figs. 2 and 3, the cap 10 has a plate-shaped second elastic piece 10j that extends upward from the upper surface of the top wall 10a on the radial outer side of the through hole in the top wall 10a and is elastically deformable radially outward. As shown in Figs. 2 and 3, the second elastic piece 10j of this embodiment has a plate-shaped root portion (second root portion 10k) that is connected to the top wall 10a and has an arc shape in a plan view, an inclined portion (second inclined portion 10m) that inclines radially outward as it moves upward from the upper end of the second root portion 10k, and a tip portion (second tip portion 10n) that extends upward from the upper end of the second inclined portion 10m. The second elastic piece 10j of this embodiment is provided on the left and right sides (two in total) so as to face the central axis O, and the first inclined portion 10g and the second inclined portion 10m are adjacent to each other in the circumferential direction. The first elastic piece 10e and the second elastic piece 10j have the same shape except that the first inclined portion 10g and the second inclined portion 10m are inclined in opposite directions, and the gaps between adjacent first elastic pieces 10e and second elastic pieces 10j are all equal. Here, the distance from the central axis O to the radial center position of the second elastic piece 10j (the center position in the thickness direction at the second root portion 10k) is defined as distance L2. Distance L1 and distance L2 are equal.

The head 11 is cylindrical and has a tubular portion 11a that is inserted into the stem 7a and is held in place by it. The upper portion of the tubular portion 11a is provided with a top portion 11b that is shaped so that the upper surface is concave downward and has a passage inside that leads to the tubular portion 11a. The top portion 11b is provided with a nozzle 11c that is cylindrical and extends radially outward, leading to a passage provided inside the top portion 11b. The tip of the nozzle 11c is provided with a discharge port 11d through which the content liquid is discharged by the pump-type discharger 100.

The head 11 also has an extension 11e that extends downward from the top 11b and the nozzle 11c. In this embodiment, the extension 11e is cylindrical with the center at the central axis O. The lower end (tip 11f) of the extension 11e is shaped so that its vertical cross section is semicircular, as shown in Figures 1 and 2. Here, the distance from the central axis O to the radial center position of the extension 11e (the center position of the extension 11e in the thickness direction) is defined as the distance LS. In this embodiment, the above-mentioned distances L1 and L2 are all equal to the distance LS.

In the pump-type dispenser 100 constructed of such members, before the head 11 is pressed as shown in Figures 1 to 3, the tip 11f of the extension 11e is in contact with the first inclined portion 10g of the first elastic piece 10e and the second inclined portion 10m of the second elastic piece 10j, and the head 11 is in a raised state (the head 11 is retracted from the cap 10). In this state, the first tip 10h is located radially inward from the tip 11f, and the second tip 10n is located radially outward from the tip 11f.

When the head 11 is pressed from above to lower it (the head 11 is advanced toward the cap 10), the stem 7a is pushed down together with the head 11 as shown in FIG. 4 (the stem 7a moves toward the cap 10 along the central axis O). As the stem 7a is pushed down, the bottom 5b also descends via the connecting tube 5a, and the liquid-tight contact between the annular portion 5d and the lower portion of the inner sliding piece 6c is released. When the head 11 is further pressed down, the piston 6 also descends together with the cylindrical member 7 and the internal member 5, and the inside of the cylinder 1 is pressurized. As a result, the liquid in the cylinder 1 passes through the communication port 5c, passes through the connecting tube 5a, the stem 7a, the cylindrical portion 11a, the passage provided inside the top 11b, and the inside of the nozzle 11c, and is discharged from the discharge port 11d to the outside world. When the head 11 is pressed and the piston 6 descends below the vent 1f, the container (not shown) communicates with the outside world through the vent 1f. This prevents the pressure inside the container from becoming negative even if the liquid contained in the container decreases, preventing the container from being deformed or crushed.

When the head 11 is pressed down, the extension 11e applies a pressing force to the first elastic piece 10e and the second elastic piece 10j, so that the first elastic piece 10e bends radially inward as shown in Figures 4 and 6, and the second elastic piece 10j bends radially outward as shown in Figures 5 and 6. In this embodiment, as shown in Figure 1, the first tip 10h of the first elastic piece 10e is located radially inward from the tip 11f of the extension 11e, so that the first elastic piece 10e can be reliably bent radially inward when the head 11 is pressed down. Also, as shown in Figure 2, the second tip 10n of the second elastic piece 10j is located radially outward from the tip 11f of the extension 11e, so that the second elastic piece 10j can be reliably bent radially outward when the head 11 is pressed down. In addition, since the first elastic piece 10e has a first inclined portion 10g and the second elastic piece 10j has a second inclined portion 10m, the tip 11f of the extension portion 11e, which contacts the first inclined portion 10g and the second inclined portion 10m, moves downward, so that the first elastic piece 10e can be smoothly deflected radially inward, and the second elastic piece 10j can be smoothly deflected radially outward. In particular, the tip 11f of this embodiment has a semicircular vertical cross-sectional shape and contacts the first elastic piece 10e and the second elastic piece 10j without getting caught, so that the first elastic piece 10e and the second elastic piece 10j can be deflected more smoothly.

When the pressure on the head 11 is then released, the restoring force of the deflected first elastic piece 10e and second elastic piece 10j acts on the head 11, causing it to begin to rise. As a result, the piston 6 rises together with the internal member 5 while the lower part of the inner sliding piece 6c comes into liquid-tight contact with the annular portion 5d again, reducing the pressure inside the cylinder 1. This causes the valve body portion 2b to move away from the bottom wall portion 1a, opening the suction port 1d, and the liquid content in the container can be sucked into the cylinder 1 through the pipe 4.

In this way, the pump-type dispenser 100 of this embodiment can return the head 11 after discharging the liquid content without using a metal coil spring, and can be used in the same way as a conventional pump-type dispenser. In addition, since the first elastic piece 10e and the second elastic piece 10j bend in opposite directions, a force that twists the extension 11e also acts between the first elastic piece 10e and the second elastic piece 10j. Therefore, the head 11 can be more reliably returned. In addition, when a flexible elastic piece such as the first elastic piece 10e or the second elastic piece 10j is repeatedly bent, it may become worn and its restorability may decrease. However, in this embodiment, a force that twists the extension 11e by the first elastic piece 10e and the second elastic piece 10j also acts, so the head 11 can be returned even if it is used repeatedly.

In addition, in this embodiment, the two first elastic pieces 10e and the two second elastic pieces 10j are arranged so that the first elastic piece 10e and the second elastic piece 10j are adjacent to each other. When the first elastic piece 10e and the second elastic piece 10j are arranged adjacent to each other in this manner, the first elastic piece 10e and the second elastic piece 10j are brought closer to each other, so that the force that twists out the extension portion 11e becomes greater, and the head 11 can be returned more reliably.

In order to move the head 11 up and down without tilting, it is preferable that the restoring force of the first elastic piece 10e and the restoring force of the second elastic piece 10j are applied equally to the head 11, and therefore it is preferable that the position of the first elastic piece 10e relative to the extension portion 11e and the position of the second elastic piece 10j relative to the extension portion 11e are equal. As described above, the radial center position of the extension portion 11e in this embodiment is at a distance LS from the central axis O. Also, the radial center position of the first elastic piece 10e is at a distance L1 from the central axis O, and the radial center position of the second elastic piece 10j is at a distance L2 from the central axis O. In other words, in order to move the head 11 up and down without tilting, it is preferable to satisfy the relationship LS-L1=L2-LS. In this embodiment, the distances L1, L2, and LS are all equal and satisfy the above relationship, so the head 11 can be moved up and down without tilting. Furthermore, even if the first elastic piece 10e is moved radially inward from the illustrated state and the second elastic piece 10j is moved radially outward by the same amount, the head 11 can be moved up and down without tilting.

In addition, the pump-type discharger 100 of this embodiment has an excellent appearance because the first elastic piece 10e and the second elastic piece 10j are surrounded by the upper peripheral wall 10c, making the first elastic piece 10e and the second elastic piece 10j invisible from the radial outside.

The pump-type dispenser 100 shown in Figures 1 to 6 has a first elastic piece 10e and a second elastic piece 10j on the cap 10 and an extension 11e on the head 11, but these may be interchanged. This will be explained with reference to Figures 7 to 10.

In a modified example of the pump-type dispenser 100 shown in Figures 7 and 8, the cap 10 is provided with an extension 10p, and the head 11 is provided with a first elastic piece 11g and a second elastic piece 11j.

In this embodiment, the extension portion 10p extends upward from the top wall 10a and is cylindrical with its center on the central axis O. Here, the distance from the central axis O to the radial center position of the extension portion 10p (the center position of the extension portion 10p in the thickness direction) is defined as the distance LS.

The first elastic piece 11g and the second elastic piece 11j extend downward from the top 11b and the nozzle 11c. The first elastic piece 11g and the second elastic piece 11j of this embodiment are plate-shaped in a circular arc shape in a plan view, like the first elastic piece 10e and the second elastic piece 10j shown in FIG. 3. In addition, a total of two first elastic pieces 11g are provided so as to face the central axis O, and a total of two second elastic pieces 11j are provided so as to face the central axis O, and the first elastic piece 11g and the second elastic piece 11j are adjacent to each other in the circumferential direction like the first elastic piece 10e and the second elastic piece 10j, and the gaps between the adjacent first elastic pieces 11g and the second elastic pieces 11j are all equal. Here, the distance from the central axis O to the radial center position of the first elastic piece 11g (the center position in the thickness direction of the first elastic piece 11g) is defined as distance L3, and the distance from the central axis O to the radial center position of the second elastic piece 11j (the center position in the thickness direction of the second elastic piece 11j) is defined as distance L4. As shown in the figure, the radial center position of the first elastic piece 11g is radially inward from the radial center position of the extension portion 10p, and the radial center position of the second elastic piece 11j is radially outward from the radial center position of the extension portion 10p. In addition, the first elastic piece 11g and the second elastic piece 11j in this embodiment are arranged so as to satisfy LS-L3=L4-LS in relation to the distance LS of the extension portion 10p. The tip (lower end) of the first elastic piece 11g is provided with an inclined portion (first inclined portion 11h) that inclines radially inward as it extends downward, and the tip (lower end) of the second elastic piece 11j is provided with an inclined portion (second inclined portion 11k) that inclines radially outward as it extends downward. In the state shown in Figures 7 and 8, the tip (upper end) of the extension portion 10p is in contact with the first inclined portion 11h and the second inclined portion 11k.

In such a modified example of the pump-type dispenser 100, when the head 11 is pushed down, the liquid contents can be discharged from the discharge port 11d. When the head 11 is pushed down, the first elastic piece 11g is pressed against the extension portion 10p and bends radially inward as shown in FIG. 9, and the second elastic piece 11j is pressed against the extension portion 10p and bends radially outward as shown in FIG. 10. As described above, the radial center position of the first elastic piece 11g is radially inward from the radial center position of the extension portion 10p, and the tip of the extension portion 10p is in contact with the first inclined portion 11h that inclines radially inward as it moves downward, so that when the head 11 is pushed down, the first elastic piece 11g can be reliably bent radially inward. In addition, the radial center position of the second elastic piece 11j is radially outward of the radial center position of the extension portion 10p, and the tip of the extension portion 10p is in contact with the second inclined portion 11k, which inclines radially outward as it moves downward, so that when the head 11 is pressed down, the second elastic piece 11j can be reliably deflected radially outward. When the pressure on the head 11 is released, the head 11 can be returned to its original position by the restoring force of the deflected first inclined portion 11h and the second elastic piece 11j.

Next, a pump type dispenser 200, which is a second embodiment of the pump type dispenser according to the present invention, will be described with reference to Figs. 11 to 21. As shown in the drawings, the pump type dispenser 200 is used by being attached to the mouth portion P1 of a bottle-shaped container P.

The pump-type dispenser 200 is composed of a cylinder 21, a valve member 22, a pipe 24, an internal member 25, a piston 26, a cylindrical member 27, a holder 28, a packing 29, a cap 30, and a head 31. A nozzle piece 32 is assembled into the head 31. The cylinder 21, the valve member 22, the internal member 25, the piston 26, the cylindrical member 27, and the holder 28 are components that constitute the "pump" in this specification. Among the above components, the valve member 22, the piston 26, and the packing 29 are made of elastic soft synthetic resin (e.g., polyethylene (LDPE, HDPE, foamed PE)), and the other components are made of hard synthetic resin (e.g., polypropylene (PP), polybutylene terephthalate (PBT), polyacetal (POM) resin, etc.).

The cylinder 21 has a bottom wall portion 21a, a tube wall portion 21b, a flange wall 21c, a suction port 21d, a retaining tube 21e, and a vent hole 21f, which are configured similarly to the bottom wall portion 1a, the tube wall portion 1b, the flange wall 1c, the suction port 1d, the retaining tube 1e, and the vent hole 21f of the cylinder 1 described above.

The valve member 22 has a base 22a that is rod-shaped at the top and lidded cylindrical at the bottom. The lidded cylindrical portion of the base 22a has openings as shown in FIG. 11, and these openings are arranged at intervals in the circumferential direction. This lidded cylindrical portion is fitted into the cylindrical wall portion 21b, and the valve member 22 is held inside the cylinder 21. The inside of the base 22a is provided with a valve body portion 22b that covers the suction port 21d and sits on the upper surface of the bottom wall portion 21a, and an elastically deformable connecting piece 22c that connects the base 22a and the valve body portion 22b.

The pipe 24 is hollow, and its upper end is inserted into and fitted into the retaining tube 21e.

The internal member 25 includes a cylindrical connecting tube 25a, a bottom portion 25b that closes the lower end of the connecting tube 25a, and a cylindrical lower tube 25e that fits along the inner circumferential surface of the tube wall portion 21b and is connected to the bottom portion 25b via connecting pieces that are spaced apart in the circumferential direction. The connecting tube 25a is provided with a communication port 25c that passes through it, and the top surface of the bottom portion 25b is provided with an annular portion 25d that is located radially outward of the connection portion with the connecting tube 25a.

The piston 26 has an annular base 26a, an outer sliding piece 26b extending upward and downward from the outer edge of the base 26a, and an inner sliding piece 26c extending upward and downward from the inner edge of the base 26a. The outer sliding piece 26b slidably and liquid-tightly contacts the inner peripheral surface of the tube wall portion 21b. The lower part of the inner sliding piece 26c slidably and liquid-tightly contacts the annular portion 25d, and the upper part slidably and liquid-tightly contacts the inner peripheral surface of the enlarged diameter portion 27b of the tubular member 27, which will be described later.

The tubular member 27 has a cylindrical stem 27a and an expanded diameter portion 27b that is connected to the lower end of the stem 27a and has a larger diameter than the stem 27a. When the connecting tube 25a is inserted into the stem 27a, the two fit together, and the internal member 25 and the tubular member 27 move together in the vertical direction relative to the cylinder 21. The internal member 25 and the tubular member 27 are supported rotatably around the central axis O relative to the cylinder 21.

The holder 28 has a portion located radially outward of the stem 27a and a portion located radially outward of the enlarged diameter portion 27b, and is provided with a holder base 28a that is fitted and held against the inner peripheral surface of the tube wall portion 21b. A flange 28b that extends radially outward is provided at the upper end of the holder base 28a.

The gasket 29 is in the shape of a circular ring plate and is inserted into the cylindrical wall portion 21b of the cylinder 21 and is held in place by fitting thereto.

The cap 30 has a disk-shaped top wall 30a with a through hole in the center. The outer edge of the top wall 30a is provided with a lower peripheral wall 30b extending downward and an upper peripheral wall 30c (corresponding to the "cap side peripheral wall" in this specification) extending upward. The lower peripheral wall 30b can fit and hold the flange wall 21c at the edge of the through hole described above, thereby holding the cylinder 21 in the cap 30. The inner surface of the lower peripheral wall 30b is provided with a female threaded portion 30d that screws into the male threaded portion P2 provided on the mouth portion P1 of the container P, and the cap 30 can be attached to the container by screwing the male threaded portion P2 and the female threaded portion 30d together.

As shown in FIG. 12, the cap 30 includes a plate-like first elastic piece 30e that extends upward from the upper surface of the top wall 30a and is elastically deformable radially inward on the radially outer side of the through hole in the top wall 30a. As shown in FIG. 12 and FIG. 13, the first elastic piece 30e of this embodiment includes a plate-like root portion (first root portion 30f) that is connected to the top wall 30a and has an arc shape in a plan view, and an inclined portion (first inclined portion 30g) that inclines radially inward as it moves upward from the upper end of the first root portion 30f. In this embodiment, two first elastic pieces 30e are provided in total, arranged opposite the central axis O. Here, the distance from the central axis O to the radial center position of the first elastic piece 30e (the center position in the thickness direction of the first root portion 30f) is defined as the distance L5.

Furthermore, as shown in Figs. 11 and 13, the cap 30 has a plate-shaped second elastic piece 30j that extends upward from the upper surface of the top wall 30a and can elastically deform radially outward on the radially outer side of the through hole in the top wall 30a. As shown in Figs. 11 and 13, the second elastic piece 30j of this embodiment has a plate-shaped root portion (second root portion 30k) that is connected to the top wall 30a and has an arc shape in a plan view, and an inclined portion (second inclined portion 30m) that inclines radially outward as it moves upward from the upper end of the second root portion 30k. In this embodiment, a total of two second elastic pieces 30j are provided between the two first elastic pieces 30e so as to face the central axis O, and the first elastic piece 30e and the second elastic piece 30j are adjacent to each other in the circumferential direction. As shown in FIG. 13, the line passing through the widthwise center of the two second elastic pieces 30j (line F-F in FIG. 13) is perpendicular to the line passing through the widthwise center of the two first elastic pieces 30e (line G-G in FIG. 13). Here, the distance from the central axis O to the radial center position of the second elastic piece 30j (the thicknesswise center position of the second root portion 30k) is defined as distance L6.

As shown in Fig. 13, the upper peripheral wall 30c of the cap 30 has four grooves (standby position small groove 30p, standby position large groove 30q, operating position small groove 30r, and operating position large groove 30s) that extend vertically and recess the inner peripheral surface of the upper peripheral wall 30c radially outward. Here, the standby position large groove 30q is a groove with a larger circumferential width than the standby position small groove 30p, and the operating position large groove 30s is a groove with a larger circumferential width than the operating position small groove 30r. The operating position small groove 30r and the operating position large groove 30s correspond to the "vertical groove" in this specification. As shown in the figure, the standby position small groove portion 30p and the standby position large groove portion 30q are arranged to face the central axis O, and the line passing through the widthwise center of the standby position small groove portion 30p and the standby position large groove portion 30q (line H-H in FIG. 13) is inclined at an angle of 45° clockwise from the line passing through the widthwise center of the two second elastic pieces 30j (line F-F in FIG. 13). The operation position small groove portion 30r and the operation position large groove portion 30s are arranged to face the central axis O, and the widthwise center of the operation position small groove portion 30r and the operation position large groove portion 30s are arranged to be located on the line passing through the widthwise center of the two second elastic pieces 30j (line F-F in FIG. 13).

In addition, in this embodiment, the inner peripheral surface of the upper peripheral wall 30c is located radially outward between the standby position small groove portion 30p and the operation position small groove portion 30r, and between the standby position large groove portion 30q and the operation position large groove portion 30s, from the standby position small groove portion 30p and the operation position large groove portion 30s, and from the operation position small groove portion 30r and the standby position large groove portion 30q. Here, the inner peripheral surface of the upper peripheral wall 30c between the standby position small groove portion 30p and the operation position small groove portion 30r, and the inner peripheral surface between the standby position large groove portion 30q and the operation position large groove portion 30s are referred to as the contact surface 30t. In other words, the inner diameter of the contact surface 30t is larger than the inner diameter between the standby position small groove portion 30p and the operation position large groove portion 30s. The inner diameter of the contact surface 30t is smaller than the inner diameters of the standby position small groove portion 30p, the standby position large groove portion 30q, the operating position small groove portion 30r, and the operating position large groove portion 30s.

Furthermore, the cap 30 has a step portion (stopper 30u) that protrudes upward from the top wall 30a as shown in Fig. 14, in the area from the contact surface 30t between the standby position small groove portion 30p and the operation position small groove portion 30r to the standby position small groove portion 30p as shown in Fig. 13. The stopper 30u is also provided in the area from the contact surface 30t between the standby position large groove portion 30q and the operation position large groove portion 30s to the standby position small groove portion 30p as shown in Fig. 13.

The head 31 is cylindrical and has a tubular portion 31a into which the stem 27a is inserted and fitted to hold it. When the head 31 is fitted with the stem 27a, it can move vertically together with the internal member 25 and the tubular member 27 relative to the cylinder 21, and can rotate around the central axis O together with the internal member 25 and the tubular member 27 relative to the cylinder 21. The top of the tubular portion 31a is provided with a top portion 31b whose upper surface is shaped to be concave downward. Inside the top portion 31b, a lateral passage 31c is provided that leads to the inside of the tubular portion 31a, as shown in FIG. 15.

The head 31 also has an extension 31e that extends downward from the top 31b. In this embodiment, the extension 31e is cylindrical and centered on the central axis O. Here, the distance from the central axis O to the radial center position of the extension 31e (the center position of the extension 31e in the thickness direction) is defined as the distance LS. In this embodiment, the extension 31e is arranged so that the relationship between the distance L5 of the first elastic piece 30e and the distance L6 of the second elastic piece 30j described above satisfies LS-L5=L6-LS.

The extension 31e has an inward protrusion 31g that protrudes radially inward and extends vertically as shown in Figs. 13 and 16, and an outward protrusion 31h that protrudes radially outward and extends vertically as shown in Figs. 13 and 15. As shown in Fig. 13, two inward protrusions 31g are provided so as to face the central axis O. Two outward protrusions 31h are also provided so as to face the central axis O. Here, in the state shown in Fig. 13, the inward protrusions 31g are provided at a position where the straight line connecting the two inward protrusions 31g is inclined at an angle of 45° counterclockwise with respect to the straight line F-F. In the state shown in Fig. 13, the outward protrusion 31h is provided so as to be located on the straight line H-H. Here, when the head 31 has rotated to the position shown in FIG. 13 (hereinafter, this position is referred to as the "standby position"), the inward convex portion 31g and the outward convex portion 31h are not in contact with the first elastic piece 30e and the second elastic piece 30j. Also, in the standby position, as shown in FIG. 11 and FIG. 12, the first elastic piece 30e and the second elastic piece 30j are in a state where the first inclined portion 30g and the second inclined portion 30m are in contact with the tip of the extension portion 31e, but are hardly bent radially inward or outward.

The head 31 further includes a cylindrical head-side peripheral wall 31j that is connected to the outer edge of the top 31b. The head-side peripheral wall 31j has a smaller diameter than the upper peripheral wall 30c. As shown in Figures 13, 15, and 16, the lower end of the head-side peripheral wall 31j is provided with two protrusions (small protrusion 31k and large protrusion 31m) that protrude radially outward. Here, the large protrusion 31m is a protrusion with a circumferential width larger than that of the small protrusion 31k. The small protrusion 31k is sized to fit into the standby position small groove portion 30p and the operation position small groove portion 30r, and the large protrusion 31m is sized to fit into the standby position large groove portion 30q and the operation position large groove portion 30s. In the state shown in Figure 13, the small protrusion 31k and the large protrusion 31m are arranged to face the central axis O and to be located on the straight line H-H. The outer diameter from the outer edge of the small protrusion 31k to the outer edge of the large protrusion 31m is slightly larger than the inner diameter between the two contact surfaces 30t described above, and when the head 31 rotates around the central axis O, the outer edges of the small protrusion 31k and the large protrusion 31m come into contact with the contact surface 30t.

As shown in the figure, the nozzle piece 32 has a cylindrical base and a tapered tip, and the base is inserted into the horizontal passage 31c and is held in place by it. The tip of the nozzle piece 32 is connected to the horizontal passage 31c and has a discharge port 32a through which the liquid content passing through the horizontal passage 31c is discharged.

In the pump-type dispenser 200 constructed of such members, when the head 31 is rotated to the standby position shown in Figures 11 to 13, the small protrusion 31k fits into the standby position small groove 30p, and the large protrusion 31m fits into the standby position large groove 30q. In this state, the small protrusion 31k and the large protrusion 31m are located above the stopper 30u as shown in Figure 14. In other words, even if an attempt is made to press down the head 31, the small protrusion 31k and the large protrusion 31m come into contact with the stopper 30u, preventing the head 31 from moving downward. Therefore, when the head 31 is in the standby position, the head 31 is not inadvertently pressed down, and the liquid contents are not unintentionally dispensed.

In addition, in the standby position, the inward convex portion 31g and the outward convex portion 31h are not in contact with the first elastic piece 30e and the second elastic piece 30j as shown in FIG. 13, and the first elastic piece 30e and the second elastic piece 30j are in a state where they are hardly bent radially inward or outward as shown in FIG. 11 and FIG. 12. In other words, if the first elastic piece 30e and the second elastic piece 30j are left in a bent state for a long period of time, the first elastic piece 30e and the second elastic piece 30j may become worn, and in this case, there is a risk that the bent first elastic piece 30e and the second elastic piece 30j will not be restored to their original state, but in this embodiment, such a defect can be prevented.

When discharging the liquid contents, the head 31 is rotated to the position shown in FIG. 17 (hereinafter, this position is referred to as the "operating position"). When rotating the head 31 from the standby position to the operating position, the small protrusion 31k that was in the standby position small groove 30p moves to the operating position small groove 30r while contacting the contact surface 30t shown in FIG. 13, and the large protrusion 31m that was in the standby position large groove 30q moves to the operating position large groove 30s while contacting the contact surface 30t. In other words, when rotating the head 31, friction occurs between the small protrusion 31k and the contact surface 30t, and between the large protrusion 31m and the contact surface 30t, creating resistance, so the head 31 does not rotate inadvertently from the standby position to the operating position.

When the head 31 is rotated toward the operating position, as shown in FIG. 17, the inward convex portion 31g contacts the first elastic piece 30e, and the outward convex portion 31h contacts the second elastic piece 30j. In this state, the first elastic piece 30e is slightly bent radially inward by the inward convex portion 31g as shown in FIG. 16, and the second elastic piece 30j is slightly bent radially outward by the outward convex portion 31h as shown in FIG. 15. In other words, the restoring forces of the first elastic piece 30e and the second elastic piece 30j act on the head 31, so the head 31 can be raised to the top dead center.

In addition, in the operating position shown in Figure 17, the small projection 31k and the large projection 31m are circumferentially offset from the stopper 30u shown in Figure 13, so that the head 31 can be pushed down as shown in Figures 18 and 19. This also pushes down the stem 27a, and the bottom 25b also descends via the connecting tube 25a, releasing the liquid-tight contact between the annular portion 25d and the lower part of the inner sliding piece 26c. When the head 31 is further pushed down, the piston 26 descends together with the cylindrical member 27 and the internal member 25, pressurizing the inside of the cylinder 21, and the liquid content in the cylinder 21 is discharged to the outside world from the discharge port 32a.

When the head 31 is pressed down, the inward convex portion 31g applies a pressing force to the first elastic piece 30e, and the outward convex portion 31h applies a pressing force to the second elastic piece 30j, so that the first elastic piece 30e bends radially inward as shown in FIG. 19, and the second elastic piece 30j bends radially outward as shown in FIG. 18.

When the pressure on the head 31 is then released, the restoring force of the deflected first elastic piece 30e and second elastic piece 30j acts on the head 31, causing the head 31 to begin to rise. As a result, the piston 26 rises together with the internal member 25 while the lower part of the inner sliding piece 26c comes into liquid-tight contact with the annular portion 25d again, reducing the pressure inside the cylinder 21. As a result, the valve body portion 22b moves away from the bottom wall portion 21a, opening the suction port 21d, and the liquid content in the container can be sucked into the cylinder 21 through the pipe 24.

The pump-type dispenser 200 rotates the head 31 between a standby position and an operating position, but it is also possible to provide a new function. This will be explained with reference to Figures 20 and 21.

In the modified example of the pump-type dispenser 200 shown in Figures 20 and 21, the head 31 can be rotated from the standby position to the operating position, and then further rotated to the second operating position. Note that the position shown in Figure 20 is the state in which the head 31 has been rotated to the operating position, and the position shown in Figure 21 is the state in which the head 31 has been rotated to the second operating position.

In this modified example, the upper peripheral wall 30c of the cap 30 further includes a second operating position small groove portion 30v and a second operating position large groove portion 30w. Here, the second operating position large groove portion 30w is a groove portion having a circumferential width larger than that of the second operating position small groove portion 30v. Also, as shown in FIG. 20, when the head 31 is rotated to the operating position, the second operating position small groove portion 30v and the second operating position large groove portion 30w are provided in a position that faces the central axis O and is inclined at an angle of 45° counterclockwise with respect to the line M-M, so that the straight line passing through the center of the width direction of the second operating position small groove portion 30v and the second operating position large groove portion 30w faces the central axis O. The second operating position small groove portion 30v and the second operating position large groove portion 30w correspond to the "second vertical groove" in this specification.

The inner peripheral surface of the upper peripheral wall 30c is located radially inward of the above-mentioned contact surface 30t between the operation position small groove portion 30r and the second operation position small groove portion 30v, and between the operation position large groove portion 30s and the second operation position large groove portion 30w. Here, the inner peripheral surface of the upper peripheral wall 30c between the operation position small groove portion 30r and the second operation position small groove portion 30v, and the inner peripheral surface of the upper peripheral wall 30c between the operation position large groove portion 30s and the second operation position large groove portion 30w are referred to as the second contact surface 30x.

In this modified example, the extension 31e of the head 31 further includes a second inward convex portion 31n that protrudes radially inward and extends vertically, and a second outward convex portion 31p that protrudes radially outward and extends vertically. Here, the second inward convex portion 31n protrudes radially inward to a greater extent than the inward convex portion 31g, and the second outward convex portion 31p protrudes radially outward to a greater extent than the outward convex portion 31h. Two second inward convex portions 31n are provided to face the central axis O, and two second outward convex portions 31p are also provided to face the central axis O. When the head 31 is rotated to the operating position as shown in FIG. 20, the second inward convex portion 31n is positioned so that the line connecting the two second inward convex portions 31n is inclined at an angle of 45° counterclockwise with respect to the line M-M, and the second outward convex portion 31p is positioned so that the line connecting the two second outward convex portions 31p is inclined at an angle of 45° clockwise with respect to the line M-M.

According to this modification, when the head 31 is rotated to the standby position and when it is rotated to the operating position, the same function as the pump-type dispenser 200 described with reference to Figs. 13 to 19 can be obtained. However, when the pump-type dispenser 200 is used repeatedly, the first elastic piece 30e and the second elastic piece 30j may become worn, and the head 31 may not be able to return completely to the top dead center. In such a case, the head 31 is rotated to the second operating position as shown in Fig. 21. In the second operating position, the second inward convex portion 31n contacts the first elastic piece 30e, and the second outward convex portion 31p contacts the second elastic piece 30j. That is, since the second inward convex portion 31n and the second outward convex portion 31p protrude more than the inward convex portion 31g and the outward convex portion 31h, the first elastic piece 30e and the second elastic piece 30j can be deflected more. Therefore, the restoring force of the first elastic piece 30e and the second elastic piece 30j acts more strongly, so that the head 31 can be raised to the top dead center even if the first elastic piece 30e or the second elastic piece 30j has become worn. Since the second contact surface 30x is located radially inward of the contact surface 30t, when the head 31 is rotated from the operating position to the second operating position, the friction with the small protrusion 31k and the large protrusion 31m is greater than when the head 31 is rotated from the standby position to the operating position, and a greater resistance is exerted. Therefore, the head 31 will not be rotated from the operating position to the second operating position inadvertently.

Although one embodiment of the present invention has been described above, the present invention is not limited to the specific embodiment, and various modifications and changes are possible within the scope of the spirit of the present invention described in the claims unless otherwise specifically limited in the above description. For example, the configuration of the above-mentioned embodiment can be added or deleted as appropriate, and the configuration of one embodiment can be applied to other embodiments. Furthermore, the effects of the above-mentioned embodiment are merely examples of the effects resulting from the present invention, and do not mean that the effects of the present invention are limited to the above-mentioned effects.

For example, the pump described above is an example, and the present invention also includes cases where other types of pumps are used. The number of first elastic pieces 10e, 30e and second elastic pieces 10j, 30j can be set arbitrarily, and is not limited to multiple, but may be singular. The positions at which the first elastic pieces 10e, 30e and second elastic pieces 10j, 30j are provided can also be changed as appropriate. For example, the first elastic piece 10e may be provided on the left and right sides of the cap 10, and the second elastic piece 10j may be provided on the front and back sides of the cap 10. Furthermore, the first elastic pieces 10e, 30e and the second elastic pieces 10j, 30j are not limited to being arc-shaped in plan view as shown in the figure, and may be rectangular in plan view, for example. The extensions 11e, 31e are not limited to being cylindrical, and may be square tube-shaped, for example.

As shown in Figures 13 to 15, in the above-mentioned embodiment, the small protrusions 31k and the large protrusions 31m are provided on the head-side peripheral wall 31j, and the standby position small groove portion 30p, the standby position large groove portion 30q, the operation position small groove portion 30r, and the operation position large groove portion 30s are provided on the upper peripheral wall 30c. However, the standby position small groove portion 30p, the standby position large groove portion 30q, the operation position small groove portion 30r, and the operation position large groove portion 30s may be provided on the head-side peripheral wall 31j, and the small protrusions 31k and the large protrusions 31m may be provided on the upper peripheral wall 30c. In this case, the contact surface 30t may be provided on the head-side peripheral wall 31j.

1: Cylinder 1a: Bottom wall 1b: Cylinder wall 1c: Flange wall 1d: Inlet 1e: Retaining cylinder 1f: Vent 2: Valve member 2a: Base 2b: Valve body 2c: Connecting piece 4: Pipe 5: Internal member 5a: Connecting cylinder 5b: Bottom 5c: Communication port 5d: Annular portion 6: Piston 6a: Base 6b: Outer sliding piece 6c: Inner sliding piece 7: Cylindrical member 7a: Stem 7b: Expanded diameter portion 8: Holder 8a: Holder base 8b: Flange 9: Gasket 10: Cap 10a: Top wall 10b: Lower peripheral wall 10c: Upper peripheral wall (cap side peripheral wall)
10d: Female thread portion 10e: First elastic piece 10f: First root portion 10g: First inclined portion 10h: First tip portion 10j: Second elastic piece 10k: Second root portion 10m: Second inclined portion 10n: Second tip portion 10p: Extension portion 11: Head 11a: Cylindrical portion 11b: Top portion 11c: Nozzle 11d: Discharge port 11e: Extension portion 11f: Tip portion 11g: First elastic piece 11h: First inclined portion 11j: Second elastic piece 11k: Second inclined portion 100: Pump type discharger 21: Cylinder 21a: Bottom wall portion 21b: Cylindrical wall portion 21c: Flange wall 21 d: suction port 21e: holding tube 21f: vent 22: valve member 22a: base 22b: valve body 22c: connecting piece 24: pipe 25: internal member 25a: connecting tube 25b: bottom 25c: communication port 25d: annular portion 25e: lower tube 26: piston 26a: base 26b: outer sliding piece 26c: inner sliding piece 27: cylindrical member 27a: stem 27b: enlarged diameter portion 28: holder 28a: holder base 28b: flange 29: packing 30: cap 30a: top wall 30b: lower peripheral wall 30c: upper peripheral wall (cap side peripheral wall)
30d: Female thread portion 30e: First elastic piece 30f: First root portion 30g: First inclined portion 30j: Second elastic piece 30k: Second root portion 30m: Second inclined portion 30p: Standby position small groove portion 30q: Standby position large groove portion 30r: Operation position small groove portion (vertical groove)
30s: Operation position large groove portion (vertical groove)
30t: contact surface 30u: stopper 30v: second operation position small groove portion (second vertical groove)
30w: Second operation position large groove portion (second vertical groove)
30x: second contact surface 31: head 31a: cylindrical portion 31b: top portion 31c: lateral passage 31e: extension portion 31g: inward convex portion 31h: outward convex portion 31j: head side peripheral wall 31k: small projection 31m: large projection 31n: second inward convex portion 31p: second outward convex portion 32: nozzle piece 32a: discharge port 200: pump type discharger O: central axis line

Claims (13)

A pump-type dispenser comprising: a cap that is attached to the mouth of a container that contains a liquid content; a pump that is held at the mouth by the cap and is driven by the back and forth movement of a stem; and a head that has a discharge port for discharging the liquid content to the outside and is connected to the stem, the head being moved toward the cap to discharge the liquid content from the discharge port,
An extension portion is provided on one of the head and the cap, the extension portion extending toward the other of the head and the cap,
A pump-type dispenser in which the other of the head and the cap is provided with a first elastic piece that is bent by the extension portion in a direction toward the central axis of the stem and a second elastic piece that is bent in a direction away from the central axis when the head is advanced toward the cap. The pump-type dispenser according to claim 1, wherein the first elastic piece and the second elastic piece are arranged adjacent to each other on the cap. The extension portion has a cylindrical shape centered on the central axis line,
A pump-type discharger as described in claim 1, wherein the distance from the radial center position of the extension portion to the radial center position of the first elastic piece is equal to the distance from the radial center position of the extension portion to the radial center position of the second elastic piece. the first elastic piece has a first tip portion that is located closer to the central axis than a tip portion of the extension portion when the head is retracted from the cap,
2. The pump-type dispenser according to claim 1, wherein the second elastic piece has a second tip portion that is located farther from the central axis than the tip portion of the extension portion when the head is retracted from the cap. The pump-type dispenser according to claim 1, wherein the tip of the extension has a semicircular cross-sectional shape. The pump-type discharger according to any one of claims 1 to 5, wherein the cap has a cap-side peripheral wall that extends in a direction circumferentially around the central axis and surrounds the first elastic piece and the second elastic piece. The head is rotatable about the central axis relative to the cap between a standby position and an operating position,
The extension portion has an inward convex portion that protrudes toward the central axis and an outward convex portion that protrudes away from the central axis,
when the head is rotated to the standby position, the inward convex portion is not in contact with the first elastic piece and the outward convex portion is not in contact with the second elastic piece,
2. A pump-type dispenser as described in claim 1, wherein when the head is rotated to the operating position, the inward convex portion bends the first elastic piece in a direction toward the central axis and the outward convex portion bends the second elastic piece in a direction away from the central axis. The pump-type dispenser according to claim 7, wherein the cap has a stopper that is non-contact when the head is rotated to the operating position and moved toward the cap, and that contacts the head to prevent movement toward the cap when the head is rotated to the standby position and moved toward the cap. the cap has a cap-side peripheral wall extending in a direction circumferentially around the central axis, and the head has a head-side peripheral wall extending in a direction circumferentially around the central axis,
One of the cap side peripheral wall and the head side peripheral wall has a projection protruding toward the other one,
8. The pump-type dispenser according to claim 7, wherein the other of the cap side peripheral wall and the head side peripheral wall has a vertical groove extending along the central axis and into which the protrusion fits when the head is rotated to the operating position. The pump-type dispenser according to claim 9, wherein the other of the cap-side peripheral wall and the head-side peripheral wall extends in a direction circumferential to the central axis, is located between the standby position and the operating position, and has a contact surface that contacts the protrusion in a radial direction. the head is rotatable about the central axis relative to the cap from the standby position through the operating position to a second operating position,
the extension portion has the inward convex portion, a second inward convex portion that protrudes in a direction toward the central axis and has a larger protrusion amount than the inward convex portion, the outward convex portion, and a second outward convex portion that protrudes in a direction away from the central axis and has a larger protrusion amount than the outward convex portion,
when the head is rotated to the standby position, the inward convex portion and the second inward convex portion are not in contact with the first elastic piece, and the outward convex portion and the second outward convex portion are not in contact with the second elastic piece,
When the head is rotated to the operating position, the inward convex portion bends the first elastic piece toward the central axis, and the outward convex portion bends the second elastic piece away from the central axis,
8. A pump-type dispenser as described in claim 7, wherein, when the head is rotated to the second operating position, the second inward convex portion bends the first elastic piece toward the central axis more than the inward convex portion bends the first elastic piece, and the second outward convex portion bends the second elastic piece away from the central axis more than the outward convex portion bends the second elastic piece. the cap has a cap-side peripheral wall extending in a direction circumferentially around the central axis, and the head has a head-side peripheral wall extending in a direction circumferentially around the central axis,
One of the cap side peripheral wall and the head side peripheral wall has a projection protruding toward the other one,
the other of the cap side peripheral wall and the head side peripheral wall has a vertical groove extending along the central axis and into which the protrusion is received when the head is rotated to the operating position;
The pump-type dispenser according to claim 11, wherein the other of the cap side peripheral wall and the head side peripheral wall has a second vertical groove extending along the central axis and into which the protrusion is received when the head is rotated to the second operating position. the other of the cap side peripheral wall and the head side peripheral wall has a contact surface extending in a direction circumferentially around the central axis, positioned between the standby position and the operation position, and in radial contact with the protrusion;
The pump-type dispenser according to claim 12, wherein the other of the cap side peripheral wall and the head side peripheral wall has a second contact surface extending in a direction circumferentially about the central axis, located between the operating position and the second operating position, and located closer to the central axis than the contact surface and in radial contact with the protrusion.

Images